Laser Velocimeter Study of Methane Roof Layers

摘要

Laser velocimeter measurements were made to quantify the mixing between a simulated roof layer and ventilation air in a model mine. A model mine was built and the effect of the following were measured: Reynolds number, Richardson number, air speed, layer thickness, gas density, turbulence intensity, and mixing length. A turbulence model was used to explain the data. Engineering drawings were provided and optics were aligned; computer programs for data acquisition and an instruction manual were also provided.